Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7157153 | Computers & Fluids | 2014 | 65 Pages |
Abstract
An implicit predictor-corrector method is presented for the simultaneous integration of the six degrees-of-freedom (DOF) equations of motion for a manoeuvring submarine and the unsteady Reynolds-Averaged Navier Stokes (URANS) equations describing the vehicle hydrodynamics. The novel method uses coefficient-based hydrodynamic models for estimating the Jacobian matrix for Newton iteration. The method is applied to emergency rising and horizontal plane zig-zag manoeuvres. It is shown to converge faster at each timestep than under-relaxed fixed-point iteration with an optimum relaxation parameter. A simple model containing only primary linear hydrodynamic coefficients that are relatively easy to estimate or measure was found to be adequate for modelling the Jacobian matrix in these simulations.
Related Topics
Physical Sciences and Engineering
Engineering
Computational Mechanics
Authors
Mark C. Bettle, Andrew G. Gerber, George D. Watt,